<?php // $Id: timezoneimport.php,v 1.10.4.4 2007/12/31 15:24:22 stronk7 Exp $

	// Automatic update of Timezones from a new source
	
	require_once('../config.php');
	require_once($CFG->libdir.'/adminlib.php');
	require_once($CFG->libdir.'/filelib.php');
	require_once($CFG->libdir.'/olson.php');
	
	admin_externalpage_setup('timezoneimport');

	$ok = optional_param('ok', 0, PARAM_BOOL);


/// Print headings

	$strimporttimezones = get_string('importtimezones', 'admin');

	admin_externalpage_print_header();

	print_heading($strimporttimezones);

	if (!$ok or !confirm_sesskey()) {
		$message = '<br /><br />';
		$message .= $CFG->dataroot.'/temp/olson.txt<br />';
		$message .= $CFG->dataroot.'/temp/timezone.txt<br />';
		$message .= '<a href="http://download.moodle.org/timezone/">http://download.moodle.org/timezone/</a><br />';
		$message .= '<a href="'.$CFG->wwwroot.'/lib/timezone.txt">'.$CFG->dirroot.'/lib/timezone.txt</a><br />';
		$message .= '<br />';

		$message = get_string("configintrotimezones", 'admin', $message);

		notice_yesno($message, 'timezoneimport.php?ok=1&amp;sesskey='.sesskey(), 'index.php');

		admin_externalpage_print_footer();
		exit;
	}


/// Try to find a source of timezones to import from

	$importdone = false;

/// First, look for an Olson file locally

	$source = $CFG->dataroot.'/temp/olson.txt';
	if (!$importdone and is_readable($source)) {
		if ($timezones = olson_to_timezones($source)) {
			update_timezone_records($timezones);
			$importdone = $source;
		}
	}

/// Next, look for a CSV file locally

	$source = $CFG->dataroot.'/temp/timezone.txt';
	if (!$importdone and is_readable($source)) {
		if ($timezones = get_records_csv($source, 'timezone')) {
			update_timezone_records($timezones);
			$importdone = $source;
		}
	}

/// Otherwise, let's try moodle.org's copy
	$source = 'http://download.moodle.org/timezone/';
	if (!$importdone && ($content=download_file_content($source))) {
		if ($file = fopen($CFG->dataroot.'/temp/timezone.txt', 'w')) {			// Make local copy
			fwrite($file, $content);
			fclose($file);
			if ($timezones = get_records_csv($CFG->dataroot.'/temp/timezone.txt', 'timezone')) {  // Parse it
				update_timezone_records($timezones);
				$importdone = $source;
			}
			unlink($CFG->dataroot.'/temp/timezone.txt');
		}
	}


/// Final resort, use the copy included in Moodle
	$source = $CFG->dirroot.'/lib/timezone.txt';
	if (!$importdone and is_readable($source)) {  // Distribution file
		if ($timezones = get_records_csv($source, 'timezone')) {
			update_timezone_records($timezones);
			$importdone = $source;
		}
	}


/// That's it!

	if ($importdone) {
		$a = null;
		$a->count = count($timezones);
		$a->source  = $importdone;
		print_heading(get_string('importtimezonescount', 'admin', $a), '', 3);

		print_continue('index.php');

		$timezonelist = array();
		foreach ($timezones as $timezone) {
			if (is_array($timezone)) {
				$timezone = (object)$timezone;
			}
			if (isset($timezonelist[$timezone->name])) {
				$timezonelist[$timezone->name]++;
			} else {
				$timezonelist[$timezone->name] = 1;
			}
		}
		ksort($timezonelist);

		echo "<br />";
		print_simple_box_start('center');
		foreach ($timezonelist as $name => $count) {
			echo "$name ($count)<br />";
		}
		print_simple_box_end();

	} else {
		print_heading(get_string('importtimezonesfailed', 'admin'), '', 3);
		print_continue('index.php');
	}

	admin_externalpage_print_footer();

?>
